Multi-stage dehydration pretreatment device for kitchen waste incineration treatment

Abstract

The invention belongs to the technical field of kitchen waste treatment, and particularly relates to a multistage dehydration pretreatment device for kitchen waste incineration treatment. The bottom of the spiral conveying assembly is fixedly communicated with a dry-wet separation assembly, the bottom of the dry-wet separation assembly is fixedly communicated with a rolling drying assembly, and redundant steam is conveyed into the rolling drying assembly through a waste heat conveying pipe. The output end of the servo motor drives a linkage rod, so that the spiral conveying assembly, the dry-wet separation assembly and the rolling drying assembly swing in a reciprocating mode with the linkage rod as the center, and the centrifugal effect at the joint of the kitchen garbage in the spiral conveying assembly and the dry-wet separation assembly is improved; and the wet materials of the separated kitchen garbage are subjected to sewage recovery through the rolling drying assembly, and the dry materials of the separated kitchen garbage are subjected to continuous rolling drying, so that the kitchen garbage reaches a dry material state convenient to incinerate after being subjected to multi-stage dehydration treatment.

Description

Technical Field

[0001] This invention belongs to the field of kitchen waste treatment technology, and specifically relates to a multi-stage dehydration pretreatment device for kitchen waste incineration. Background Technology

[0002] The production of food waste continues to rise, and its high moisture content (typically 70%-80%) poses a major challenge to incineration. Existing dehydration equipment generally suffers from insufficient pretreatment; direct incineration would lead to reduced calorific value, increased energy consumption, and the generation of large amounts of harmful flue gas.

[0003] Currently widely used single-stage dehydration technologies, such as mechanical pressing or simple thermal drying, have limited dehydration efficiency and are difficult to reduce the moisture content to a suitable range for incineration (usually below 50%).

[0004] Furthermore, existing equipment is prone to secondary pollution during the dehydration process and has poor adaptability to fluctuations in waste composition, which restricts the stability and environmental friendliness of subsequent incineration. Therefore, there is an urgent need to develop a highly efficient, adaptable, and environmentally friendly multi-stage dehydration pretreatment device to improve the overall efficiency of food waste incineration.

[0005] A search revealed that Chinese Patent Publication No. CN116871296B, authorized on January 5, 2024, discloses a deep dewatering and filtration device for kitchen waste, belonging to the field of waste treatment technology. This invention includes a filter press box, within which a filter press mechanism is installed for dewatering and filtration of kitchen waste. By setting up this filter press mechanism, the upper filter press component works in conjunction with the lower filter press component to dewater and filter the pulverized waste. The adjustable rollers on the lower filter press component are used to adjust the tension of the lower filter belt and the pressure between the lower filter belt and the filter press rollers, improving the dewatering quality of the waste and enabling continuous dewatering and filtration of kitchen waste, thus increasing the dewatering efficiency. A pulverizing mechanism is used to pulverize large pieces of kitchen waste, facilitating subsequent dewatering and filtration by the filter press mechanism. A material distribution mechanism conveys the pulverized waste to the lower filter belt in a uniform manner, preventing excessive accumulation of kitchen waste on the lower filter belt.

[0006] However, the equipment still has the following drawbacks: although it can prevent excessive accumulation of kitchen waste on the filter belt, it cannot perform multi-stage dehydration and drying of kitchen waste, resulting in unsatisfactory treatment effects. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a multi-stage dehydration pretreatment device for kitchen waste incineration, comprising a screw conveyor assembly; the bottom of the screw conveyor assembly is fixed and connected to a dry-wet separation assembly, the bottom of the dry-wet separation assembly is fixed and connected to a rolling drying assembly, the outer wall of the screw conveyor assembly is a jacketed structure for conveying steam from the incinerator, and excess steam is conveyed to the rolling drying assembly through a waste heat conveying pipe, so that the dry material of the kitchen waste after passing through the dry-wet separation assembly is continuously dried in the rolling drying assembly; Both sides of the outer wall of the spiral conveyor assembly are fixedly connected to linkage rods, and the ends of the two sets of linkage rods are rotatably connected to the support frame. A servo motor is fixedly connected to one side of the outer wall of the support frame, and the output end of the servo motor is connected to a set of linkage rods for transmission.

[0008] Furthermore, the spiral conveying assembly includes a feeding pipe; a double-layer cavity is formed on the side wall of the feeding pipe, and a first through hole is formed on one side of the outer wall of the feeding pipe, and the first through hole is connected to one end of the waste heat conveying pipe.

[0009] Furthermore, a hopper is fixedly connected to the top of the feeding pipe, and an opening for disposing of kitchen waste is provided on one side wall of the hopper. A stepper motor is embedded in the top of the inner wall of the hopper, and a driven rod is driven to the output end of the stepper motor.

[0010] Furthermore, one end of the driven rod extends to the bottom of the inner wall of the feeding pipe, and a spiral blade for conveying kitchen waste to the side away from the hopper is fixedly connected to the outer wall of the driven rod. A steam conveying hole is opened on the outer wall of the feeding pipe and on the side near the hopper.

[0011] Furthermore, the dry-wet separation component includes a conical cylinder; the top end of the conical cylinder is fixedly connected to and communicates with the bottom end of the feeding pipe, a driving mechanism is fixedly connected to the bottom end of the inner wall of the conical cylinder, and a linkage component is drivenly connected to the output end of the driving mechanism; an air injection hole is embedded in one side of the outer wall of the conical cylinder, and one end of the air injection hole is communicated with the output end of the high-pressure air pump.

[0012] Furthermore, the driving mechanism includes a positioning ring; the positioning ring is fixedly connected to the bottom end of the inner wall of the conical cylinder, and a storage tube is embedded in the top of the conical cylinder. A beveled arc edge is formed at the outer edge of the top of the storage tube, and the outer wall of the beveled arc edge is in close contact with the inner wall of the conical cylinder. A diversion frame is fixedly connected to the bottom end of the inner wall of the storage tube, and a plurality of diversion grooves are formed on the outer wall of the diversion frame. A first motor is fixedly connected to the center of the bottom central axis of the diversion frame.

[0013] Furthermore, the linkage component includes a porous filter plate; the diameter of the porous filter plate is the same as the inner diameter of the top of the conical cylinder, and the top of the inner wall of the conical cylinder is fitted and connected to the outer edge of the porous filter plate. A linkage tube is slidably sleeved at the center of the central axis of the porous filter plate, and a second motor is fixedly connected to the inner wall of the linkage tube. The output end of the second motor is driven by a lead screw, and the top of the lead screw is rotatably connected to the top of the inner wall of the linkage tube.

[0014] Furthermore, the top of the linkage tube is a closed structure, a linkage disc is threaded onto the lead screw, a hollow sliding cavity is formed on one side wall of the linkage tube, and a slider is slidably attached to the inner wall of the hollow sliding cavity. One end of the slider is fixedly connected to the porous filter plate, and the other end of the slider is fixedly connected to the linkage disc. A waterproof corrugated plate is connected between the top of the inner wall of the hollow sliding cavity and the top of the slider.

[0015] Furthermore, the rolling drying assembly includes a feeding bend; one end of the feeding bend is fastened to the bottom of the positioning ring via a flange and is interconnected with it, the other end of the feeding bend is connected to an insulation pipe, the top of the insulation pipe is provided with a second through hole, and the second through hole is interconnected with the other end of the waste heat conveying pipe, and a drain valve is embedded on one side of the bottom of the feeding bend.

[0016] Furthermore, a third motor is embedded at the connection between the feeding bend and the outer wall of the insulation pipe, and the output end of the third motor is connected to an isolation plate. The isolation plate is movably fitted to the connection between the feeding bend and the inner wall of the insulation pipe. An air pump is also embedded on the outer wall of the insulation pipe away from the feeding bend. A linkage cylinder is slidably fitted to the inner wall of the insulation pipe, and the end of the linkage cylinder away from the isolation plate has a closed structure.

[0017] The beneficial effects of this invention are: 1. One side of the screw conveyor assembly is used to centrally transfer kitchen waste to the wet-dry separation assembly. The screw conveyor assembly continuously conveys the kitchen waste towards the wet-dry separation assembly, compressing it and separating it into wet and dry components. During this process, the output of the servo motor drives the linkage rod, causing the screw conveyor assembly, wet-dry separation assembly, and rolling drying assembly to oscillate back and forth around the linkage rod. This increases the centrifugal force at the connection between the kitchen waste in the screw conveyor assembly and the wet-dry separation assembly. The rolling drying assembly then recovers the wet material of the separated kitchen waste as wastewater, while the dry material of the separated kitchen waste undergoes continuous rolling drying. This multi-stage dehydration process ensures that the kitchen waste reaches a dry state suitable for incineration.

[0018] 2. The kitchen waste requiring pretreatment is fed into the hopper through its opening. The output of a stepper motor drives a driven rod, causing the spiral blades to rotate and convey the kitchen waste towards the porous filter plate. Steam is then connected to the incinerator via a steam conveying port, allowing for rapid steam transport into the interlayer cavity. This increases the conveying temperature of the kitchen waste by the spiral blades in the feeding pipe, achieving primary heating and material conveying of the kitchen waste. The liquid portion of the kitchen waste, gradually approaching the porous filter plate, is passed through the filter plate and stored in the feeding bend. Wastewater is discharged through a drain valve. This process of solid-liquid separation during the conveying process, influenced by the heating environment, improves separation efficiency.

[0019] 3. The output end of the second motor drives the lead screw to rotate continuously, causing the linkage disc and slider threaded onto the lead screw to move the porous filter plate in a rising and falling motion along the radial direction of the hollow slide cavity. When the porous filter plate moves to the bottom of the inner wall of the feeding pipe, the continuous rotation of the stepper motor drives the kitchen waste on the spiral blades to continuously approach the porous filter plate. After the kitchen waste accumulates on the porous filter plate, it forms pressure to squeeze the kitchen waste, which is used to further squeeze and dehydrate the kitchen waste on the porous filter plate, thereby improving the dehydration efficiency.

[0020] 4. When the porous filter plate moves to the bottom of the hollow sliding cavity, high-pressure gas is blown onto the upper surface of the porous filter plate through the air injection hole. The output end of the first motor drives the bottom of the linkage tube to rotate, so that different positions on the upper surface of the porous filter plate are brought closer to the air injection hole during the synchronous rotation of the porous filter plate. The air injection hole continuously blows gas horizontally onto the upper surface of the porous filter plate. After dehydration, the kitchen waste falls into the feeding bend and is stored on one side of the isolation plate, improving storage efficiency.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of the multi-stage dehydration pretreatment device according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the structure of the spiral conveyor assembly according to an embodiment of the present invention is shown. Figure 1 ; Figure 3 A schematic diagram of the structure of the spiral conveyor assembly according to an embodiment of the present invention is shown. Figure 2 ; Figure 4 A schematic diagram of the dry-wet separation component according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the drive mechanism according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the linkage component according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the structure of the rotary drying assembly according to an embodiment of the present invention is shown. Figure 1 ; Figure 8 A schematic diagram of the structure of the rotary drying assembly according to an embodiment of the present invention is shown. Figure 2 ; Figure 9 A schematic diagram of the structure of the rotary drying assembly according to an embodiment of the present invention is shown. Figure 3 .

[0024] In the diagram: 1. Screw conveyor assembly; 11. Feeding pipe; 12. Jacket cavity; 13. First through hole; 14. Discharge hopper; 15. Stepper motor; 16. Driven rod; 17. Screw blade; 18. Steam conveying hole; 2. Dry and wet separation assembly; 21. Conical cylinder; 22. Drive mechanism; 221. Positioning ring; 222. Collection cylinder; 223. Beveled arc edge; 224. Diverting frame; 225. Diverting groove; 226. First motor; 23. Linkage assembly; 231. Porous filter plate; 232. Linkage pipe; 233. Second motor; 234. Lead screw; 23 5. Linkage plate; 236. Hollow slide cavity; 237. Slider; 238. Waterproof corrugated plate; 24. Air injection hole; 3. Rolling drying assembly; 31. Feeding bend; 32. Insulation pipe; 33. Second through hole; 34. Drain valve; 35. Third motor; 36. Air pump; 37. Isolation plate; 38. Linkage cylinder; 39. External gear ring; 310. Gear; 311. Limiting ring; 312. Fourth motor; 313. Cylinder support; 314. Cylinder; 315. Dry material outlet one; 316. Dry material outlet two; 4. Linkage rod; 5. Support frame; 6. Waste heat conveying pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides a multi-stage dehydration pretreatment device for kitchen waste incineration, including a screw conveyor assembly 1; exemplarily, such as... Figure 1 As shown.

[0027] The bottom of the spiral conveying assembly 1 is fixed and connected to the dry and wet separation assembly 2. The bottom of the dry and wet separation assembly 2 is fixed and connected to the rolling drying assembly 3. The outer wall of the spiral conveying assembly 1 is a jacketed structure for conveying steam from the incinerator. Excess steam is conveyed to the rolling drying assembly 3 through the waste heat conveying pipe 6, so that the dry material of the kitchen waste after passing through the dry and wet separation assembly 2 is continuously dried in the rolling drying assembly 3. Both sides of the outer wall of the spiral conveying assembly 1 are fixedly connected to linkage rods 4, and the ends of the two sets of linkage rods 4 are rotatably connected to the support frame 5. A servo motor is fixedly connected to one side of the outer wall of the support frame 5, and the output end of the servo motor is connected to a set of linkage rods 4 in a transmission connection.

[0028] Specifically, one side of the screw conveyor assembly 1 is used to centrally transfer kitchen waste to the wet-dry separation assembly 2, and the screw conveyor assembly 1 continuously conveys the kitchen waste towards the wet-dry separation assembly 2 to compress the kitchen waste and achieve wet-dry separation. During this process, the output end of the servo motor drives the linkage rod 4, causing the screw conveyor assembly 1, the wet-dry separation assembly 2, and the rolling drying assembly 3 to swing back and forth around the linkage rod 4, increasing the centrifugal force at the connection between the kitchen waste in the screw conveyor assembly 1 and the wet-dry separation assembly 2. Then, the rolling drying assembly 3 is used to recycle the wet material of the separated kitchen waste, while the dry material of the separated kitchen waste is continuously rolled and dried, so that the kitchen waste reaches a dry material state that is easy to incinerate after multi-stage dehydration treatment.

[0029] The spiral conveyor assembly 1 includes a feeding pipe 11; for example, such as... Figure 2 and Figure 3 As shown.

[0030] The side wall of the feeding pipe 11 has a double-layer cavity 12. The outer wall of the feeding pipe 11 has a first through hole 13, which is connected to one end of the waste heat conveying pipe 6. The top of the feeding pipe 11 is fixedly connected to a hopper 14, and the side wall of the hopper 14 has an opening for discharging kitchen waste. The top of the inner wall of the hopper 14 is embedded with a stepper motor 15, and the output end of the stepper motor 15 is drivenly connected to a driven rod 16. One end of the driven rod 16 extends to the bottom of the inner wall of the feeding pipe 11, and the outer wall of the driven rod 16 is fixedly connected to a spiral blade 17 for conveying kitchen waste to the side away from the hopper 14. The outer wall of the feeding pipe 11 and the side close to the hopper 14 have a steam conveying hole 18.

[0031] The dry-wet separation component 2 includes a conical cylinder 21; for example, such as Figure 4 As shown.

[0032] The top end of the conical cylinder 21 is fixedly connected to the bottom end of the feeding pipe 11 and they communicate with each other. The bottom end of the inner wall of the conical cylinder 21 is fixedly connected to a driving mechanism 22, and the output end of the driving mechanism 22 is connected to a linkage component 23. An air injection hole 24 is embedded on one side of the outer wall of the conical cylinder 21, and one end of the air injection hole 24 is connected to the output end of the high-pressure air pump.

[0033] The drive mechanism 22 includes a positioning ring 221; for example, such as Figure 5 As shown.

[0034] The positioning ring 221 is fixedly connected to the bottom of the inner wall of the conical cylinder 21, and a storage cylinder 222 is embedded in the top of the conical cylinder 21. A beveled arc edge 223 is provided at the outer edge of the top of the storage cylinder 222. The outer wall of the beveled arc edge 223 is in close contact with the inner wall of the conical cylinder 21. A diversion frame 224 is fixedly connected to the bottom of the inner wall of the storage cylinder 222, and a plurality of diversion grooves 225 are provided on the outer wall of the diversion frame 224. A first motor 226 is fixedly connected to the center of the bottom central axis of the diversion frame 224.

[0035] The linkage component 23 includes a porous filter plate 231; for example, such as Figure 6 As shown.

[0036] The diameter of the porous filter plate 231 is the same as the inner diameter of the top of the conical cylinder 21, and the top of the inner wall of the conical cylinder 21 is fitted to the edge of the outer wall of the porous filter plate 231. A linkage tube 232 is slidably sleeved at the center of the central axis of the porous filter plate 231. A second motor 233 is fixedly connected to the inner wall of the linkage tube 232. The output end of the second motor 233 is driven by a lead screw 234, and the top of the lead screw 234 is rotatably connected to the top of the inner wall of the linkage tube 232. The top end of the linkage tube 232 is a closed structure. The lead screw 234 is threadedly connected to the linkage disc 235. A hollow sliding cavity 236 is opened on one side wall of the linkage tube 232, and a slider 237 is slidably attached to the inner wall of the hollow sliding cavity 236. One end of the slider 237 is fixedly connected to the porous filter plate 231, and the other end of the slider 237 is fixedly connected to the linkage disc 235. A waterproof corrugated plate 238 is connected between the top end of the inner wall of the hollow sliding cavity 236 and the top end of the slider 237.

[0037] Furthermore, the bottom end of the linkage tube 232 is connected to the output end of the first motor 226, and the top end of the linkage tube 232 is rotatably connected to the bottom end of the driven rod 16.

[0038] The rolling drying assembly 3 includes a feeding bend 31; for example, such as Figure 7 , Figure 8 and Figure 9 As shown.

[0039] One end of the feeding bend 31 is fastened to the bottom of the positioning ring 221 via a flange and is interconnected. The other end of the feeding bend 31 is connected to an insulation pipe 32. The top of the insulation pipe 32 has a second through hole 33, which is interconnected with the other end of the waste heat conveying pipe 6. A drain valve 34 is embedded in one side of the bottom of the feeding bend 31. A third motor 35 is embedded in the connection between the feeding bend 31 and the outer wall of the insulation pipe 32. The output end of the third motor 35 is connected to an isolation plate 37. The isolation plate 37 is movably fitted to the connection between the inner wall of the feeding bend 31 and the insulation pipe 32. An air pump 36 is also embedded in the outer wall of the insulation pipe 32 on the side away from the feeding bend 31. A linkage cylinder 38 is slidably fitted to the inner wall of the insulation pipe 32, and the end of the linkage cylinder 38 on the side away from the isolation plate 37 is sealed. The structure is closed. An external gear ring 39 is fixedly connected to the outer wall of the linkage cylinder 38 near the closed structure. A gear 310 is meshed with the top of the external gear ring 39. Limiting rings 311 are fixedly connected to both sides of the gear 310, and the limiting rings 311 are movably fitted to both sides of the external gear ring 39. One end of the gear 310 is driven to the output end of the fourth motor 312, and a cylinder 314 is driven to the side of the fourth motor 312 away from the output end. A cylinder support 313 is embedded in the cylinder 314, and the cylinder support 313 is fixedly connected to the top of the insulation pipe 32. A dry material outlet 315 is opened at the bottom of the insulation pipe 32 on the side away from the second through hole 33. A dry material outlet 316 is also opened at the bottom of the linkage cylinder 38. The dry material outlet 316 and the dry material outlet 315 are interconnected and used in conjunction.

[0040] Specifically, the hopper 14 uses its opening to feed the kitchen waste that needs to be pre-treated, and the output end of the stepper motor 15 drives the driven rod 16, so that the spiral blades 17 convey the kitchen waste towards the porous filter plate 231 during rotation. After connecting the steam in the incinerator through the steam conveying hole 18, the steam is rapidly conveyed into the interlayer cavity 12, increasing the conveying temperature of the kitchen waste by the spiral blades 17 in the feeding pipe 11, which is used to complete the primary heating and conveying of the kitchen waste. The liquid in the kitchen waste that gradually approaches the porous filter plate 231 is passed down through the porous filter plate 231 and stored in the feeding bend 31. The wastewater in the kitchen waste is discharged through the drain valve 34, so that the kitchen waste undergoes solid-liquid separation under the influence of the heating environment during the conveying process. The output end of the second motor 233 drives the lead screw 234 to rotate continuously, causing the linkage disk 235 and slider 237 threadedly connected to the lead screw 234 to move the porous filter plate 231 in a rising and falling state along the radial direction of the hollow slide cavity 236. When the porous filter plate 231 moves to the bottom of the inner wall of the feeding pipe 11, the continuous rotation of the stepper motor 15 drives the kitchen waste on the spiral blade 17 to continuously approach the porous filter plate 231, so that after the kitchen waste accumulates on the porous filter plate 231, it forms pressure to squeeze the kitchen waste, which is used to further squeeze and dehydrate the kitchen waste on the porous filter plate 231. When the porous filter plate 231 moves to the bottom of the hollow sliding cavity 236, high-pressure gas is blown onto the upper surface of the porous filter plate 231 through the air injection hole 24, and the output end of the first motor 226 drives the bottom of the linkage tube 232 to rotate. During the synchronous rotation of the porous filter plate 231, different positions on the upper surface of the porous filter plate 231 approach the air injection hole 24. The air injection hole 24 continuously blows gas horizontally onto the upper surface of the porous filter plate 231, so that the dehydrated kitchen waste falls into the feeding bend 31 and is stored on one side of the isolation plate 37. The output of the third motor 35 drives the isolation plate 37, connecting the dehydrated kitchen waste on one side of the isolation plate 37 with the inside of the linkage drum 38. The output of the servo motor drives the feeding bend 31 to oscillate back and forth around the linkage rod 4, accelerating the movement of the dehydrated kitchen waste in the feeding bend 31 into the linkage drum 38. The output of the third motor 35 then drives the isolation plate 37, sealing the opening at one end of the linkage drum 38. The waste heat conveying pipe 6 then removes excess waste from the interlayer cavity 12. Heat is transferred to the linkage cylinder 38, causing the output end of the fourth motor 312 to drive the gear 310 and the external gear ring 39 to rotate, thus drying the kitchen waste in the linkage cylinder 38. Meanwhile, the output end of the cylinder 314 horizontally drives the dry material outlet 316 on the linkage cylinder 38. When the dry material outlet 316 and the dry material outlet 315 are connected, the air pump 36 continuously operates to discharge the kitchen waste that has been dried by rolling in the linkage cylinder 38 through the dry material outlet 316 and the dry material outlet 315 in sequence.

[0041] The working principle of the multi-stage dehydration pretreatment device for kitchen waste incineration proposed in this invention is as follows: The kitchen waste requiring pretreatment is fed into the hopper 14 through the opening, and the output of the stepper motor 15 drives the driven rod 16, causing the spiral blades 17 to rotate and convey the kitchen waste toward the porous filter plate 231. The steam is connected to the incinerator through the steam conveying hole 18, and the steam is rapidly conveyed into the interlayer cavity 12. This increases the conveying temperature of the kitchen waste by the spiral blades 17 in the feeding pipe 11, which is used to complete the primary heating and conveying of the kitchen waste. The liquid in the kitchen waste that gradually approaches the porous filter plate 231 is passed down through the porous filter plate 231 and stored in the feeding bend 31. The wastewater in the kitchen waste is discharged through the drain valve 34, so that the kitchen waste undergoes solid-liquid separation under the influence of the heating environment during the conveying process. The output end of the second motor 233 drives the lead screw 234 to rotate continuously, causing the linkage disk 235 and slider 237 threadedly connected to the lead screw 234 to move the porous filter plate 231 in a rising and falling state along the radial direction of the hollow slide cavity 236. When the porous filter plate 231 moves to the bottom of the inner wall of the feeding pipe 11, the continuous rotation of the stepper motor 15 drives the kitchen waste on the spiral blade 17 to continuously approach the porous filter plate 231, so that after the kitchen waste accumulates on the porous filter plate 231, it forms pressure to squeeze the kitchen waste, which is used to further squeeze and dehydrate the kitchen waste on the porous filter plate 231. When the porous filter plate 231 moves to the bottom of the hollow sliding cavity 236, high-pressure gas is blown onto the upper surface of the porous filter plate 231 through the air injection hole 24. The output end of the first motor 226 drives the bottom of the linkage tube 232 to rotate. During the synchronous rotation of the porous filter plate 231, different positions on the upper surface of the porous filter plate 231 approach the air injection hole 24. The air injection hole 24 continuously blows gas horizontally onto the upper surface of the porous filter plate 231. The dehydrated kitchen waste falls into the feeding bend 31 and is stored on one side of the isolation plate 37. The output of the third motor 35 drives the isolation plate 37, connecting the dehydrated kitchen waste on one side of the isolation plate 37 with the inside of the linkage drum 38. The output of the servo motor drives the feeding bend 31 to oscillate back and forth around the linkage rod 4, accelerating the movement of the dehydrated kitchen waste in the feeding bend 31 into the linkage drum 38. The output of the third motor 35 then drives the isolation plate 37, sealing the opening at one end of the linkage drum 38. The waste heat conveying pipe 6 then removes excess waste from the interlayer cavity 12. Heat is transferred to the linkage cylinder 38, causing the output end of the fourth motor 312 to drive the gear 310 and the external gear ring 39 to rotate, thus drying the kitchen waste in the linkage cylinder 38. Meanwhile, the output end of the cylinder 314 horizontally drives the dry material outlet 316 on the linkage cylinder 38. When the dry material outlet 316 and the dry material outlet 315 are connected, the air pump 36 continuously operates to discharge the kitchen waste that has been dried by rolling in the linkage cylinder 38 through the dry material outlet 316 and the dry material outlet 315 in sequence.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage dehydration pretreatment device for kitchen waste incineration, characterized in that: It includes a spiral conveyor assembly (1); the bottom of the spiral conveyor assembly (1) is fixed and connected to a dry and wet separation assembly (2), the bottom of the dry and wet separation assembly (2) is fixed and connected to a rolling drying assembly (3), the outer wall of the spiral conveyor assembly (1) is a jacket structure for conveying steam from the incinerator, and excess steam is conveyed to the rolling drying assembly (3) through a waste heat conveying pipe (6), so that the dry material of the kitchen waste after passing through the dry and wet separation assembly (2) is continuously dried in the rolling drying assembly (3); Both sides of the outer wall of the spiral conveying assembly (1) are fixedly connected to linkage rods (4), and the ends of the two sets of linkage rods (4) are rotatably connected to the support frame (5). A servo motor is fixedly connected to one side of the outer wall of the support frame (5), and the output end of the servo motor is connected to a set of linkage rods (4) in a transmission connection.

2. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 1, characterized in that: The spiral conveying assembly (1) includes a feeding pipe (11); a sandwich cavity (12) is provided on the side wall of the feeding pipe (11), and a first through hole (13) is provided on one side of the outer wall of the feeding pipe (11), and the first through hole (13) is connected to one end of the waste heat conveying pipe (6).

3. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 2, characterized in that: The top of the feeding pipe (11) is fixedly connected to a hopper (14), and an opening for disposing of kitchen waste is provided on one side wall of the hopper (14). A stepper motor (15) is embedded in the top of the inner wall of the hopper (14), and a driven rod (16) is connected to the output end of the stepper motor (15).

4. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 3, characterized in that: One end of the driven rod (16) extends to the bottom of the inner wall of the feeding pipe (11), and the outer wall of the driven rod (16) is fixedly connected with a spiral blade (17) for conveying kitchen waste to the side away from the hopper (14). A steam conveying hole (18) is opened on the outer wall of the feeding pipe (11) and on the side close to the hopper (14).

5. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 1, characterized in that: The dry-wet separation component (2) includes a conical cylinder (21); the top end of the conical cylinder (21) is fixedly connected to the bottom end of the feeding pipe (11) and communicates with each other; a driving mechanism (22) is fixedly connected to the bottom end of the inner wall of the conical cylinder (21), and a linkage component (23) is driven to the output end of the driving mechanism (22); an air injection hole (24) is embedded on one side of the outer wall of the conical cylinder (21), and one end of the air injection hole (24) is communicated with the output end of the high-pressure air pump.

6. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 5, characterized in that: The drive mechanism (22) includes a positioning ring (221); the positioning ring (221) is fixedly connected to the bottom of the inner wall of the conical cylinder (21), and a storage cylinder (222) is embedded in the top of the conical cylinder (21). A beveled arc edge (223) is provided at the outer edge of the top of the storage cylinder (222). The outer wall of the beveled arc edge (223) is in close contact with the inner wall of the conical cylinder (21). A diversion frame (224) is fixedly connected to the bottom of the inner wall of the storage cylinder (222), and a number of diversion grooves (225) are provided on the outer wall of the diversion frame (224). A first motor (226) is fixedly connected at the center of the bottom central axis of the diversion frame (224).

7. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 5, characterized in that: The linkage component (23) includes a porous filter plate (231); the diameter of the porous filter plate (231) is the same as the inner diameter of the top of the conical cylinder (21), and the top of the inner wall of the conical cylinder (21) is fitted and connected to the edge of the outer wall of the porous filter plate (231). A linkage tube (232) is slidably sleeved at the center of the central axis of the porous filter plate (231). A second motor (233) is fixedly connected to the inner wall of the linkage tube (232). A lead screw (234) is driven and connected to the output end of the second motor (233), and the top of the lead screw (234) is rotatably connected to the top of the inner wall of the linkage tube (232).

8. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 7, characterized in that: The top of the linkage tube (232) is a closed structure. The lead screw (234) is threaded with a linkage disc (235). A hollow sliding cavity (236) is opened on one side wall of the linkage tube (232). A slider (237) is slidably attached to the inner wall of the hollow sliding cavity (236). One end of the slider (237) is fixedly connected to the porous filter plate (231), and the other end of the slider (237) is fixedly connected to the linkage disc (235). A waterproof corrugated plate (238) is connected between the top of the inner wall of the hollow sliding cavity (236) and the top of the slider (237).

9. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 1, characterized in that: The rolling drying assembly (3) includes a feeding bend (31); one end of the feeding bend (31) is fastened to the bottom of the positioning ring (221) through a flange and communicates with each other, and the other end of the feeding bend (31) is connected to a heat insulation pipe (32). The top of the heat insulation pipe (32) is provided with a second through hole (33), and the second through hole (33) is connected to the other end of the waste heat conveying pipe (6). A drain valve (34) is embedded on one side of the bottom of the feeding bend (31).

10. The multi-stage dehydration pretreatment device for kitchen waste incineration according to claim 9, characterized in that: A third motor (35) is embedded at the connection between the outer wall of the feeding bend (31) and the insulation pipe (32), and the output end of the third motor (35) is connected to an isolation plate (37). The isolation plate (37) is movably fitted to the connection between the inner wall of the feeding bend (31) and the insulation pipe (32). An air pump (36) is also embedded on the outer wall of the insulation pipe (32) away from the feeding bend (31). A linkage cylinder (38) is slidably fitted to the inner wall of the insulation pipe (32), and the end of the linkage cylinder (38) away from the isolation plate (37) is a closed structure.

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